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  1. #1
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    Help a fellow engineer with his thesis



    hello
    i am currently working on my thesis and i am in need of a little help.

    I am making a Rankine Cycle and i am using as fluids the following:
    R134a - R290 (propane) - R600 (n-butane) - R141b - R142b - RC318 - R218


    First question: It there a big problem with me choosing R600 instead of R600a? The net is full of data for R600a but next to none for R600

    Second question: I am currently trying to find data for my chosen fluids. These data are their Ozone Depletion Potential ( ODP) , Global Warming Potential ( GWP) and their toxicity levels ( A1-A3,B1-B3). Unfortunately i have only found what i was looking for only for R134a,R141b & R142b.

    It would be a great deal of help to point me to where i can find the rest.
    Note that i am going to need a link and not just a reply since i need to include it in the references.

    Thirdly: The Rankine cycle will work between the values of 20-90 Celsius to produce electrical energy. If you have any recommendations for other fluids i will glaly hear them



  2. #2
    Join Date
    Oct 2001
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    Nottingham UK
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    Re: Help a fellow engineer with his thesis

    Lots of information available on the net

    http://www.acrib.org.uk/web_images/d...%2030.5.14.pdf
    http://www.refcom.org.uk/media/1165/...date-tb008.pdf
    https://www.google.co.uk/webhp?sourc...les+cengel+pdf

    Downloading Coolpack may also be of assistance to you in your training http://www.en.ipu.dk/Indhold/refrige.../coolpack.aspx

    Forgot to say...how are you using the Rankine cycle to produce electricity?
    Last edited by frank; 19-10-2016 at 07:53 PM. Reason: forgot question

  3. #3
    Join Date
    May 2007
    Location
    Auckland
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    Re: Help a fellow engineer with his thesis

    What is the world coming to when the supposed rocket scientists are asking trades people how to do it.
    best response would be get out of your safety zone and get your delicate hands dirty and experience the trade.
    Grumpy magoo

  4. #4
    Join Date
    Mar 2010
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    Lisbon
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    Re: Help a fellow engineer with his thesis

    You should check the last version of EN 378 and ISO 817 (https://standards.cen.eu/dyn/www/f?p...24E938F3BAEE20) for the accepted levels of GWP, ODP and toxicity level .

    About the differences between R600 and R600a, as the bubble point at atmosphere pression of R600 (buthane) is -0.5ºC it is almost not used for refrigeration. In comparison R600a (isobuthane) as a bubble point of -11.7ºC and is less inflamable then buthane.

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